HARD METAL IN PARTICULAR FOR CUTTING STONE, CONCRETE AND ASPHALT

摘要

A hard metal of WC for tools for mechanical working of stone, concrete, and asphalt conatins 5 to 25% by weight of a binder based on Co or Co and Ni. The hard metal has a coercive field strength up to 17.0 kA/m, and the binder contains up to 30% of Fe. The hard metal has a magnetic saturation (sigma or 4pisigma, in units of microtesla times cubic meter per kilogram, respectively) as a function of the Co proportion (X) in % by weight of the hard metal in a range of sigma=0.11 X to sigma=0.137 X or 4pisigma=0.44 pi X to 4pisigma=0.548 pi X.